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| author | Hamza Mahfooz <someguy@effective-light.com> | 2021-05-18 08:54:43 -0400 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2021-06-22 08:15:47 +0200 |
| commit | 2b4bbc6231d789f58676d2ccc42177df163e1c4a (patch) | |
| tree | c7ec7d228c7fcd3b551f527de9c70f0ea07730a5 /kernel/dma | |
| parent | bab1622350699dc209db4f50d9ab99e6f6465334 (diff) | |
| download | linux-2b4bbc6231d789f58676d2ccc42177df163e1c4a.tar.gz linux-2b4bbc6231d789f58676d2ccc42177df163e1c4a.tar.bz2 linux-2b4bbc6231d789f58676d2ccc42177df163e1c4a.zip | |
dma-debug: report -EEXIST errors in add_dma_entry
Since, overlapping mappings are not supported by the DMA API we should
report an error if active_cacheline_insert returns -EEXIST.
Suggested-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Hamza Mahfooz <someguy@effective-light.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'kernel/dma')
| -rw-r--r-- | kernel/dma/debug.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/kernel/dma/debug.c b/kernel/dma/debug.c index 14de1271463f..dadae6255d05 100644 --- a/kernel/dma/debug.c +++ b/kernel/dma/debug.c @@ -566,11 +566,9 @@ static void add_dma_entry(struct dma_debug_entry *entry) if (rc == -ENOMEM) { pr_err("cacheline tracking ENOMEM, dma-debug disabled\n"); global_disable = true; + } else if (rc == -EEXIST) { + pr_err("cacheline tracking EEXIST, overlapping mappings aren't supported\n"); } - - /* TODO: report -EEXIST errors here as overlapping mappings are - * not supported by the DMA API - */ } static int dma_debug_create_entries(gfp_t gfp) |